A conclusion to a book on comedy would naturally mean a good ending. Philosophically, a "good ending" is achieved when the argument arrives at the sought-after conclusion, often in a way that is different from the manner in which it was originally intended. Everything that has been said suddenly, and often unexpectedly, receives meaning and justification; the effort is repaid, and the thought is gathered together, so that nothing is left obsolete or redundant. The same is true of comedies.